2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
23 * related information and legal notices. It is expected that any future
24 * projects/authors will amend these files as needed.
28 * nav_util.c: Utilities for autonav and sail
30 * Known contributors to this file:
57 /* Format a ship name */
59 check_nav(struct sctstr *sect)
61 switch (dchr[sect->sct_type].d_flg & 03) {
66 if (sect->sct_effic < 2)
67 return CN_CONSTRUCTION;
70 if (sect->sct_effic < 60)
71 return CN_CONSTRUCTION;
79 /* load a specific ship given its
80 * location and what field to modify.
85 load_it(register struct shpstr *sp, register struct sctstr *psect, int i)
87 int comm, shipown, amount, ship_amt, sect_amt;
88 int abs_max, max_amt, transfer;
89 struct mchrstr *vship;
91 amount = sp->shp_lend[i];
92 shipown = sp->shp_own;
93 comm = sp->shp_tend[i];
94 if (CANT_HAPPEN((unsigned)comm > I_MAX))
97 ship_amt = sp->shp_item[comm];
98 sect_amt = psect->sct_item[comm];
100 /* check for disloyal civilians */
101 if (psect->sct_oldown != shipown && comm == V_CIVIL) {
103 "Ship #%d - unable to load disloyal civilians at %s.",
104 sp->shp_uid, xyas(psect->sct_x, psect->sct_y, psect->sct_own));
107 if (comm == V_CIVIL || comm == V_MILIT)
108 sect_amt--; /* leave 1 civ or mil to hold the sector. */
109 vship = &mchr[(int)sp->shp_type];
110 abs_max = max_amt = vl_find(comm, vship->m_vtype,
111 vship->m_vamt, (int)vship->m_nv);
114 return 0; /* can't load the ship, skip to the end. */
116 max_amt = min(sect_amt, max_amt - ship_amt);
117 if (max_amt <= 0 && (ship_amt != abs_max)) {
118 sp->shp_autonav |= AN_LOADING;
123 transfer = amount - ship_amt;
124 if (transfer > sect_amt) { /* not enough in the */
125 transfer = sect_amt; /* sector to fill the */
126 sp->shp_autonav |= AN_LOADING; /* ship, set load flag */
128 if (ship_amt + transfer > abs_max) /* Do not load more */
129 transfer = abs_max - ship_amt; /* then the max alowed */
133 return 0; /* nothing to move */
136 sp->shp_item[comm] = ship_amt + transfer;
137 if (comm == V_CIVIL || comm == V_MILIT)
138 sect_amt++; /*adjustment */
139 psect->sct_item[comm] = sect_amt - transfer;
141 /* deal with the plague */
142 if (psect->sct_pstage == PLG_INFECT && sp->shp_pstage == PLG_HEALTHY)
143 sp->shp_pstage = PLG_EXPOSED;
144 if (sp->shp_pstage == PLG_INFECT && psect->sct_pstage == PLG_HEALTHY)
145 psect->sct_pstage = PLG_EXPOSED;
147 return 1; /* we did someloading return 1 to keep */
148 /* our loop happy in nav_ship() */
153 * A guess alot of this looks like load_it but because of its location
154 * in the autonav code I had to split the 2 procedures up.
155 * unload_it dumps all the goods from the ship to the harbor.
156 * ONLY goods in the trade fields will be unloaded.
161 unload_it(register struct shpstr *sp)
163 struct sctstr *sectp;
172 sectp = getsectp(sp->shp_x, sp->shp_y);
174 landowner = sectp->sct_own;
175 shipown = sp->shp_own;
177 for (i = 0; i < TMAX; ++i) {
178 if (sp->shp_tend[i] == I_NONE || sp->shp_lend[i] == 0)
182 if (sectp->sct_type != SCT_HARBR)
185 comm = sp->shp_tend[i];
186 if (CANT_HAPPEN((unsigned)comm > I_MAX))
188 ship_amt = sp->shp_item[comm];
189 sect_amt = sectp->sct_item[comm];
191 /* check for disloyal civilians */
192 if (sectp->sct_oldown != shipown && comm == V_CIVIL) {
194 "Ship #%d - unable to unload civilians into a disloyal sector at %s.",
195 sp->shp_uid, xyas(sectp->sct_x, sectp->sct_y,
200 ship_amt--; /* This leaves 1 civs on board the ship */
202 max_amt = min(ship_amt, ITEM_MAX - sect_amt);
206 sp->shp_item[comm] = ship_amt - max_amt;
207 sectp->sct_item[comm] = sect_amt + max_amt;
209 if (sectp->sct_pstage == PLG_INFECT && sp->shp_pstage == PLG_HEALTHY)
210 sp->shp_pstage = PLG_EXPOSED;
211 if (sp->shp_pstage == PLG_INFECT && sectp->sct_pstage == PLG_HEALTHY)
212 sectp->sct_pstage = PLG_EXPOSED;
217 * Assume a check for fuel=0 has already been made and passed.
218 * Try to fill a ship using petro. and then oil.
220 * This should be merged with the fuel command someday.
225 auto_fuel_ship(register struct shpstr *sp)
236 getship(sp->shp_uid, sp); /* refresh */
237 /* fill with petro */
238 maxfuel = mchr[(int)sp->shp_type].m_fuelc;
239 d = (double)maxfuel / 5.0;
240 if ((d - (int)d > 0.0))
244 newfuel = supply_commod(sp->shp_own, sp->shp_x,
245 sp->shp_y, I_PETROL, need);
246 add_fuel += newfuel * 5;
247 if (add_fuel > maxfuel)
249 sp->shp_fuel += add_fuel;
250 totalfuel += add_fuel;
252 if (totalfuel == maxfuel) {
253 putship(sp->shp_uid, sp);
254 return; /* the ship is full */
258 d = (double)(maxfuel - totalfuel) / 50.0;
259 if ((d - (int)d > 0.0))
263 newfuel = supply_commod(sp->shp_own, sp->shp_x,
264 sp->shp_y, I_OIL, need);
265 add_fuel = newfuel * 50;
266 if (add_fuel > maxfuel)
268 sp->shp_fuel += add_fuel;
269 putship(sp->shp_uid, sp);